<?php
// +-----------------------------------------------------------------------+
// | Copyright (c) 2002-2003, Richard Heyes                                |
// | All rights reserved.                                                  |
// |                                                                       |
// | Redistribution and use in source and binary forms, with or without    |
// | modification, are permitted provided that the following conditions    |
// | are met:                                                              |
// |                                                                       |
// | o Redistributions of source code must retain the above copyright      |
// |   notice, this list of conditions and the following disclaimer.       |
// | o Redistributions in binary form must reproduce the above copyright   |
// |   notice, this list of conditions and the following disclaimer in the |
// |   documentation and/or other materials provided with the distribution.|
// | o The names of the authors may not be used to endorse or promote      |
// |   products derived from this software without specific prior written  |
// |   permission.                                                         |
// |                                                                       |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
// | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT  |
// | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
// | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT      |
// | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT   |
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
// | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  |
// |                                                                       |
// +-----------------------------------------------------------------------+
// | Author: Richard Heyes <richard@phpguru.org>                           |
// +-----------------------------------------------------------------------+
//
// $Id: Request.php,v 1.43 2005/11/06 18:29:14 avb Exp $
//
// HTTP_Request Class
//
// Simple example, (Fetches yahoo.com and displays it):
//
// $a = &new HTTP_Request('http://www.yahoo.com/');
// $a->sendRequest();
// echo $a->getResponseBody();
//

require_once 'Net/Socket.php';
require_once 'Net/URL.php';

define('HTTP_REQUEST_METHOD_GET',     'GET',     true);
define('HTTP_REQUEST_METHOD_HEAD',    'HEAD',    true);
define('HTTP_REQUEST_METHOD_POST',    'POST',    true);
define('HTTP_REQUEST_METHOD_PUT',     'PUT',     true);
define('HTTP_REQUEST_METHOD_DELETE',  'DELETE',  true);
define('HTTP_REQUEST_METHOD_OPTIONS', 'OPTIONS', true);
define('HTTP_REQUEST_METHOD_TRACE',   'TRACE',   true);

define('HTTP_REQUEST_HTTP_VER_1_0', '1.0', true);
define('HTTP_REQUEST_HTTP_VER_1_1', '1.1', true);

class HTTP_Request {

    
    var $_url;

    
    var $_method;

    
    var $_http;

    
    var $_requestHeaders;

    
    var $_user;
    
    
    var $_pass;

    
    var $_sock;
    
    
    var $_proxy_host;
    
    
    var $_proxy_port;
    
    
    var $_proxy_user;
    
    
    var $_proxy_pass;

    
    var $_postData;

   
    var $_body;

   
    var $_bodyDisallowed = array('TRACE');

   
    var $_postFiles = array();

    
    var $_timeout;
    
    
    var $_response;
    
    
    var $_allowRedirects;
    
    
    var $_maxRedirects;
    
    
    var $_redirects;

   
    var $_useBrackets = true;

   
    var $_listeners = array();

   
    var $_saveBody = true;

   
    var $_readTimeout = null;

   
    var $_socketOptions = null;

    
    function HTTP_Request($url = '', $params = array())
    {
        $this->_sock           = &new Net_Socket();
        $this->_method         =  HTTP_REQUEST_METHOD_GET;
        $this->_http           =  HTTP_REQUEST_HTTP_VER_1_1;
        $this->_requestHeaders = array();
        $this->_postData       = array();
        $this->_body           = null;

        $this->_user = null;
        $this->_pass = null;

        $this->_proxy_host = null;
        $this->_proxy_port = null;
        $this->_proxy_user = null;
        $this->_proxy_pass = null;

        $this->_allowRedirects = false;
        $this->_maxRedirects   = 3;
        $this->_redirects      = 0;

        $this->_timeout  = null;
        $this->_response = null;

        foreach ($params as $key => $value) {
            $this->{'_' . $key} = $value;
        }

        if (!empty($url)) {
            $this->setURL($url);
        }

                $this->addHeader('User-Agent', 'PEAR HTTP_Request class ( http://pear.php.net/ )');

                $this->addHeader('Connection', 'close');

                if (!empty($this->_user)) {
            $this->addHeader('Authorization', 'Basic ' . base64_encode($this->_user . ':' . $this->_pass));
        }

                        if (HTTP_REQUEST_HTTP_VER_1_1 == $this->_http && extension_loaded('zlib') &&
            0 == (2 & ini_get('mbstring.func_overload'))) {

            $this->addHeader('Accept-Encoding', 'gzip');
        }
    }
    
    
    function _generateHostHeader()
    {
        if ($this->_url->port != 80 AND strcasecmp($this->_url->protocol, 'http') == 0) {
            $host = $this->_url->host . ':' . $this->_url->port;

        } elseif ($this->_url->port != 443 AND strcasecmp($this->_url->protocol, 'https') == 0) {
            $host = $this->_url->host . ':' . $this->_url->port;

        } elseif ($this->_url->port == 443 AND strcasecmp($this->_url->protocol, 'https') == 0 AND strpos($this->_url->url, ':443') !== false) {
            $host = $this->_url->host . ':' . $this->_url->port;
        
        } else {
            $host = $this->_url->host;
        }

        return $host;
    }
    
    
    function reset($url, $params = array())
    {
        $this->HTTP_Request($url, $params);
    }

    
    function setURL($url)
    {
        $this->_url = &new Net_URL($url, $this->_useBrackets);

        if (!empty($this->_url->user) || !empty($this->_url->pass)) {
            $this->setBasicAuth($this->_url->user, $this->_url->pass);
        }

        if (HTTP_REQUEST_HTTP_VER_1_1 == $this->_http) {
            $this->addHeader('Host', $this->_generateHostHeader());
        }
    }
    
    
    function setProxy($host, $port = 8080, $user = null, $pass = null)
    {
        $this->_proxy_host = $host;
        $this->_proxy_port = $port;
        $this->_proxy_user = $user;
        $this->_proxy_pass = $pass;

        if (!empty($user)) {
            $this->addHeader('Proxy-Authorization', 'Basic ' . base64_encode($user . ':' . $pass));
        }
    }

    
    function setBasicAuth($user, $pass)
    {
        $this->_user = $user;
        $this->_pass = $pass;

        $this->addHeader('Authorization', 'Basic ' . base64_encode($user . ':' . $pass));
    }

    
    function setMethod($method)
    {
        $this->_method = $method;
    }

    
    function setHttpVer($http)
    {
        $this->_http = $http;
    }

    
    function addHeader($name, $value)
    {
        $this->_requestHeaders[strtolower($name)] = $value;
    }

    
    function removeHeader($name)
    {
        if (isset($this->_requestHeaders[strtolower($name)])) {
            unset($this->_requestHeaders[strtolower($name)]);
        }
    }

    
    function addQueryString($name, $value, $preencoded = false)
    {
        $this->_url->addQueryString($name, $value, $preencoded);
    }    
    
    
    function addRawQueryString($querystring, $preencoded = true)
    {
        $this->_url->addRawQueryString($querystring, $preencoded);
    }

    
    function addPostData($name, $value, $preencoded = false)
    {
        if ($preencoded) {
            $this->_postData[$name] = $value;
        } else {
            $this->_postData[$name] = $this->_arrayMapRecursive('urlencode', $value);
        }
    }

   
    function _arrayMapRecursive($callback, $value)
    {
        if (!is_array($value)) {
            return call_user_func($callback, $value);
        } else {
            $map = array();
            foreach ($value as $k => $v) {
                $map[$k] = $this->_arrayMapRecursive($callback, $v);
            }
            return $map;
        }
    }

   
    function addFile($inputName, $fileName, $contentType = 'application/octet-stream')
    {
        if (!is_array($fileName) && !is_readable($fileName)) {
            trigger_error("File '{$fileName}' is not readable", E_USER_ERROR);
        } elseif (is_array($fileName)) {
            foreach ($fileName as $name) {
                if (!is_readable($name)) {
                    trigger_error("File '{$name}' is not readable", E_USER_ERROR);
                }
            }
        }
        $this->addHeader('Content-Type', 'multipart/form-data');
        $this->_postFiles[$inputName] = array(
            'name' => $fileName,
            'type' => $contentType
        );
        return true;
    }

    
    function addRawPostData($postdata, $preencoded = true)
    {
        $this->_body = $preencoded ? $postdata : urlencode($postdata);
    }

   
    function setBody($body)
    {
        $this->_body = $body;
    }

    
    function clearPostData()
    {
        $this->_postData = null;
    }

    
    function addCookie($name, $value)
    {
        $cookies = isset($this->_requestHeaders['cookie']) ? $this->_requestHeaders['cookie']. '; ' : '';
        $this->addHeader('Cookie', $cookies . $name . '=' . $value);
    }
    
    
    function clearCookies()
    {
        $this->removeHeader('Cookie');
    }

    
    function sendRequest($saveBody = true)
    {
        if (!is_a($this->_url, 'Net_URL')) {
            trigger_error('No URL given.', E_USER_ERROR);
        }

        $host = isset($this->_proxy_host) ? $this->_proxy_host : $this->_url->host;
        $port = isset($this->_proxy_port) ? $this->_proxy_port : $this->_url->port;

                        if (strcasecmp($this->_url->protocol, 'https') == 0 AND function_exists('file_get_contents') AND extension_loaded('openssl')) {
            if (isset($this->_proxy_host)) {
                trigger_error('HTTPS proxies are not supported.', E_USER_ERROR);
            }
            $host = 'ssl://' . $host;
        }

                $magicQuotes = ini_get('magic_quotes_runtime');
        ini_set('magic_quotes_runtime', false);

                        $err = $this->_sock->connect($host, $port, null, $this->_timeout, $this->_socketOptions);
        $err = $this->_sock->write($this->_buildRequest());

        if (!empty($this->_readTimeout)) {
            $this->_sock->setTimeout($this->_readTimeout[0], $this->_readTimeout[1]);
        }

        $this->_notify('sentRequest');

                $this->_response = &new HTTP_Response($this->_sock, $this->_listeners);
        $err = $this->_response->process($this->_saveBody && $saveBody);


        ini_set('magic_quotes_runtime', $magicQuotes);


                if (    $this->_allowRedirects
            AND $this->_redirects <= $this->_maxRedirects
            AND $this->getResponseCode() > 300
            AND $this->getResponseCode() < 399
            AND !empty($this->_response->_headers['location'])) {

            
            $redirect = $this->_response->_headers['location'];

                        if (preg_match('/^https?:\/\//i', $redirect)) {
                $this->_url = &new Net_URL($redirect);
                $this->addHeader('Host', $this->_generateHostHeader());
                        } elseif ($redirect{0} == '/') {
                $this->_url->path = $redirect;
            
                        } elseif (substr($redirect, 0, 3) == '../' OR substr($redirect, 0, 2) == './') {
                if (substr($this->_url->path, -1) == '/') {
                    $redirect = $this->_url->path . $redirect;
                } else {
                    $redirect = dirname($this->_url->path) . '/' . $redirect;
                }
                $redirect = Net_URL::resolvePath($redirect);
                $this->_url->path = $redirect;
                
                        } else {
                if (substr($this->_url->path, -1) == '/') {
                    $redirect = $this->_url->path . $redirect;
                } else {
                    $redirect = dirname($this->_url->path) . '/' . $redirect;
                }
                $this->_url->path = $redirect;
            }

            $this->_redirects++;
            return $this->sendRequest($saveBody);

                } elseif ($this->_allowRedirects AND $this->_redirects > $this->_maxRedirects) {
            trigger_error('Too many redirects', E_USER_ERROR);
        }

        $this->_sock->disconnect();

        return true;
    }

    
    function getResponseCode()
    {
        return isset($this->_response->_code) ? $this->_response->_code : false;
    }

    
    function getResponseHeader($headername = null)
    {
        if (!isset($headername)) {
            return isset($this->_response->_headers)? $this->_response->_headers: array();
        } else {
            $headername = strtolower($headername);
            return isset($this->_response->_headers[$headername]) ? $this->_response->_headers[$headername] : false;
        }
    }

    
    function getResponseBody()
    {
        return isset($this->_response->_body) ? $this->_response->_body : false;
    }

    
    function getResponseCookies()
    {
        return isset($this->_response->_cookies) ? $this->_response->_cookies : false;
    }

    
    function _buildRequest()
    {
        $separator = ini_get('arg_separator.output');
        ini_set('arg_separator.output', '&');
        $querystring = ($querystring = $this->_url->getQueryString()) ? '?' . $querystring : '';
        ini_set('arg_separator.output', $separator);

        $host = isset($this->_proxy_host) ? $this->_url->protocol . '://' . $this->_url->host : '';
        $port = (isset($this->_proxy_host) AND $this->_url->port != 80) ? ':' . $this->_url->port : '';
        $path = (empty($this->_url->path)? '/': $this->_url->path) . $querystring;
        $url  = $host . $port . $path;

        $request = $this->_method . ' ' . $url . ' HTTP/' . $this->_http . "\r\n";

        if (in_array($this->_method, $this->_bodyDisallowed) ||
            (HTTP_REQUEST_METHOD_POST != $this->_method && empty($this->_body)) ||
            (HTTP_REQUEST_METHOD_POST != $this->_method && empty($this->_postData) && empty($this->_postFiles))) {

            $this->removeHeader('Content-Type');
        } else {
            if (empty($this->_requestHeaders['content-type'])) {
                                $this->addHeader('Content-Type', 'application/x-www-form-urlencoded');
            } elseif ('multipart/form-data' == $this->_requestHeaders['content-type']) {
                $boundary = 'HTTP_Request_' . md5(uniqid('request') . microtime());
                $this->addHeader('Content-Type', 'multipart/form-data; boundary=' . $boundary);
            }
        }

                if (!empty($this->_requestHeaders)) {
            foreach ($this->_requestHeaders as $name => $value) {
                $canonicalName = implode('-', array_map('ucfirst', explode('-', $name)));
                $request      .= $canonicalName . ': ' . $value . "\r\n";
            }
        }

                if (in_array($this->_method, $this->_bodyDisallowed) || 
            (HTTP_REQUEST_METHOD_POST != $this->_method && empty($this->_body))) {

            $request .= "\r\n";

                } elseif (HTTP_REQUEST_METHOD_POST == $this->_method && 
                  (!empty($this->_postData) || !empty($this->_postFiles))) {

                        if (!isset($boundary)) {
                $postdata = implode('&', array_map(
                    create_function('$a', 'return $a[0] . \'=\' . $a[1];'), 
                    $this->_flattenArray('', $this->_postData)
                ));

                        } else {
                $postdata = '';
                if (!empty($this->_postData)) {
                    $flatData = $this->_flattenArray('', $this->_postData);
                    foreach ($flatData as $item) {
                        $postdata .= '--' . $boundary . "\r\n";
                        $postdata .= 'Content-Disposition: form-data; name="' . $item[0] . '"';
                        $postdata .= "\r\n\r\n" . urldecode($item[1]) . "\r\n";
                    }
                }
                foreach ($this->_postFiles as $name => $value) {
                    if (is_array($value['name'])) {
                        $varname       = $name . ($this->_useBrackets? '[]': '');
                    } else {
                        $varname       = $name;
                        $value['name'] = array($value['name']);
                    }
                    foreach ($value['name'] as $key => $filename) {
                        $fp   = fopen($filename, 'r');
                        $data = fread($fp, filesize($filename));
                        fclose($fp);
                        $basename = basename($filename);
                        $type     = is_array($value['type'])? @$value['type'][$key]: $value['type'];

                        $postdata .= '--' . $boundary . "\r\n";
                        $postdata .= 'Content-Disposition: form-data; name="' . $varname . '"; filename="' . $basename . '"';
                        $postdata .= "\r\nContent-Type: " . $type;
                        $postdata .= "\r\n\r\n" . $data . "\r\n";
                    }
                }
                $postdata .= '--' . $boundary . "--\r\n";
            }
            $request .= 'Content-Length: ' . strlen($postdata) . "\r\n\r\n";
            $request .= $postdata;

                } elseif (!empty($this->_body)) {

            $request .= 'Content-Length: ' . strlen($this->_body) . "\r\n\r\n";
            $request .= $this->_body;
        }
        
        return $request;
    }

    function _flattenArray($name, $values)
    {
        if (!is_array($values)) {
            return array(array($name, $values));
        } else {
            $ret = array();
            foreach ($values as $k => $v) {
                if (empty($name)) {
                    $newName = $k;
                } elseif ($this->_useBrackets) {
                    $newName = $name . '[' . $k . ']';
                } else {
                    $newName = $name;
                }
                $ret = array_merge($ret, $this->_flattenArray($newName, $v));
            }
            return $ret;
        }
    }

    function attach(&$listener)
    {
        if (!is_a($listener, 'HTTP_Request_Listener')) {
            return false;
        }
        $this->_listeners[$listener->getId()] =& $listener;
        return true;
    }

    function detach(&$listener)
    {
        if (!is_a($listener, 'HTTP_Request_Listener') || 
            !isset($this->_listeners[$listener->getId()])) {
            return false;
        }
        unset($this->_listeners[$listener->getId()]);
        return true;
    }

    function _notify($event, $data = null)
    {
        foreach (array_keys($this->_listeners) as $id) {
            $this->_listeners[$id]->update($this, $event, $data);
        }
    }
}



class HTTP_Response
{
    var $_sock;
    var $_protocol;
    var $_code;
    var $_headers;
    var $_cookies;
    var $_body = '';
    var $_chunkLength = 0;
    var $_listeners = array();
    
    function HTTP_Response(&$sock, &$listeners)
    {
        $this->_sock      =& $sock;
        $this->_listeners =& $listeners;
    }

    function process($saveBody = true)
    {
        do {
            $line = $this->_sock->readLine();
            if (sscanf($line, 'HTTP/%s %s', $http_version, $returncode) != 2) {
                return trigger_error('Malformed response.', E_USER_ERROR);
            } else {
                $this->_protocol = 'HTTP/' . $http_version;
                $this->_code     = intval($returncode);
            }
            while ('' !== ($header = $this->_sock->readLine())) {
                $this->_processHeader($header);
            }
        } while (100 == $this->_code);

        $this->_notify('gotHeaders', $this->_headers);

                $chunked = isset($this->_headers['transfer-encoding']) && ('chunked' == $this->_headers['transfer-encoding']);
        $gzipped = isset($this->_headers['content-encoding']) && ('gzip' == $this->_headers['content-encoding']);
        $hasBody = false;
        if (!isset($this->_headers['content-length']) || 0 != $this->_headers['content-length']) {
            while (!$this->_sock->eof()) {
                if ($chunked) {
                    $data = $this->_readChunked();
                } else {
                    $data = $this->_sock->read(4096);
                }
                if ('' == $data) {
                    break;
                } else {
                    $hasBody = true;
                    if ($saveBody || $gzipped) {
                        $this->_body .= $data;
                    }
                    $this->_notify($gzipped? 'gzTick': 'tick', $data);
                }
            }
        }
        if ($hasBody) {
                        if ($gzipped) {
                $this->_body = gzinflate(substr($this->_body, 10));
                $this->_notify('gotBody', $this->_body);
            } else {
                $this->_notify('gotBody');
            }
        }
        return true;
    }

    function _processHeader($header)
    {
        list($headername, $headervalue) = explode(':', $header, 2);
        $headername  = strtolower($headername);
        $headervalue = ltrim($headervalue);
        
        if ('set-cookie' != $headername) {
            if (isset($this->_headers[$headername])) {
                $this->_headers[$headername] .= ',' . $headervalue;
            } else {
                $this->_headers[$headername]  = $headervalue;
            }
        } else {
            $this->_parseCookie($headervalue);
        }
    }

    function _parseCookie($headervalue)
    {
        $cookie = array(
            'expires' => null,
            'domain'  => null,
            'path'    => null,
            'secure'  => false
        );

                if (!strpos($headervalue, ';')) {
            $pos = strpos($headervalue, '=');
            $cookie['name']  = trim(substr($headervalue, 0, $pos));
            $cookie['value'] = trim(substr($headervalue, $pos + 1));

                } else {
            $elements = explode(';', $headervalue);
            $pos = strpos($elements[0], '=');
            $cookie['name']  = trim(substr($elements[0], 0, $pos));
            $cookie['value'] = trim(substr($elements[0], $pos + 1));

            for ($i = 1; $i < count($elements); $i++) {
                if (false === strpos($elements[$i], '=')) {
                    $elName  = trim($elements[$i]);
                    $elValue = null;
                } else {
                    list ($elName, $elValue) = array_map('trim', explode('=', $elements[$i]));
                }
                $elName = strtolower($elName);
                if ('secure' == $elName) {
                    $cookie['secure'] = true;
                } elseif ('expires' == $elName) {
                    $cookie['expires'] = str_replace('"', '', $elValue);
                } elseif ('path' == $elName || 'domain' == $elName) {
                    $cookie[$elName] = urldecode($elValue);
                } else {
                    $cookie[$elName] = $elValue;
                }
            }
        }
        $this->_cookies[] = $cookie;
    }

    function _readChunked()
    {
                if (0 == $this->_chunkLength) {
            $line = $this->_sock->readLine();
            if (preg_match('/^([0-9a-f]+)/i', $line, $matches)) {
                $this->_chunkLength = hexdec($matches[1]); 
                                if (0 == $this->_chunkLength) {
                    $this->_sock->readLine();                     return '';
                }
            } else {
                return '';
            }
        }
        $data = $this->_sock->read($this->_chunkLength);
        $this->_chunkLength -= strlen($data);
        if (0 == $this->_chunkLength) {
            $this->_sock->readLine();         }
        return $data;
    }

    function _notify($event, $data = null)
    {
        foreach (array_keys($this->_listeners) as $id) {
            $this->_listeners[$id]->update($this, $event, $data);
        }
    }
} ?>
 